I'm not entirely sure as there could be multiple main characters. But typically, there would be a reaper as a central figure. This reaper character might be someone who is different from the others, perhaps with a special ability or a different view on their duties.
There could also be human characters who interact with the reaper. They might be people on the verge of death or those who have some connection to the afterlife in an unexpected way. Their relationship with the reaper would be crucial in driving the story forward. For instance, they could be helping the reaper understand human emotions better or vice versa.
Maybe there are other supernatural entities apart from reapers. They could be rivals or allies to the main reaper character. These entities would add more depth and complexity to the story, creating different plotlines and character dynamics. Their interactions with the reaper and the human characters would shape the overall narrative of the Reaper Man Novels.